A driver wants to remove a Wisconsin no-air-brake restriction after previously testing in a non-air-brake passenger vehicle. Which requirement is accurate?

1. The driver must pass the air brake knowledge test and successfully perform the air brake pre-trip inspection
2. The driver only needs to pay the Passenger endorsement fee again
3. The driver must retake HazMat fingerprinting
4. The driver may self-certify the restriction away without testing